linux-kernel - Re: [PATCH v1 01/12] gna: add driver module

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Date:   Mon, 01 Mar 2021 11:18:59 +0100
From:   Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>,
        Derek Kiernan <derek.kiernan@...inx.com>,
        Dragan Cvetic <dragan.cvetic@...inx.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Documentation List <linux-doc@...r.kernel.org>,
        Tomasz Jankowski <tomasz1.jankowski@...el.com>,
        Savo Novakovic <savox.novakovic@...el.com>,
        Jianxun Zhang <jianxun.zhang@...ux.intel.com>
Subject: Re: [PATCH v1 01/12] gna: add driver module


Andy Shevchenko <andy.shevchenko@...il.com> writes:

> On Tue, Feb 16, 2021 at 6:11 PM Maciej Kwapulinski
> <maciej.kwapulinski@...ux.intel.com> wrote:
>>
....
>> +static int __init gna_drv_init(void)
>> +{
>> +       int ret;
>> +
>> +       mutex_init(&gna_drv_priv.lock);
>> +
>> +       gna_class = class_create(THIS_MODULE, "gna");
>> +       if (IS_ERR(gna_class)) {
>> +               pr_err("class device create failed\n");
>> +               return PTR_ERR(gna_class);
>> +       }
>> +       gna_class->devnode = gna_devnode;
>> +
>> +       ret = pci_register_driver(&gna_driver);
>
> Is it possible to decouple a PCI glue driver from the class as many
> other existing examples are doing?
>

I see many pci drivers (including staging) that do have it glued though.

Examples are:
1. "static int __init kp2000_pcie_init(void)" (commit on May 20 09:34:11
2019)
2. "static int __init hl_init(void)" (commit on Mon Feb 18 09:46:43 2019)

Please give me more details.